Tributes under the hashtag #JeSuisAhmed (I am Ahmed) have poured in from around the world to pay respects to a Muslim police officer among the dead in the attack on the office of Charlie Hebdo magazine in Paris.

The officer has been identified as Ahmed Merabet, a bicycle patrolman who was shot point-blank after 11 others were killed at the satirical magazine on Wednesday.

The 42-year-old's death was captured on video. It showed the wounded officer holding up his hand before one of the attackers shoots him in the head.

Gunmen flee the offices of French satirical newspaper Charlie Hebdo in Paris, in this still image taken from amateur video shot on January 7, 2015, and obtained by Reuters. (REUTERS/Handout via Reuters TV)